fix: test fun defaults (#77)

The default package parameter for TestFun is not needed because this
function is meant to target the current file only. Using the default
package parameter increased run time of time function drastically.

Co-authored-by: Ales Brelih <ales.brelih@3fs.si>

lua/go/gotest.lua

@@ -175,9 +175,6 @@ M.test_fun = function(...)
   if empty(ns) then
     return false
   end
-  local repath = utils.rel_path() or ""
-
-  local package = repath .. utils.sep() .. "..."
 
   local tags, args2 = get_build_tags(args)
   local argsstr = ""
@@ -204,9 +201,6 @@ M.test_fun = function(...)
   end
   if not empty(args2) then
     cmd = vim.list_extend(cmd, args2)
-  else
-    argsstr = package
-    table.insert(cmd, argsstr)
   end
 
   if ns.name:find("Bench") then